Bolt-extractor.



S. D. LUKE.

l BOLT EXTRAGTOR. APPLIUATION 11111111 DB0. 1, 1911.

m 1W 1%@ M 5 W 11 WOM/M 1 1 vTo SAMUEL D. LUKE, OF PINETOP, MISSUBI.

BOLT-EXTRAC'VIOR.

Specification of Letters Patent.

Patented Dec. 10, 1912.

' l Applicationled December 1, 1911. Serial No. 663,329.

To vall whom 'it may concern: i

Be it known-that I, SAMUEL D. LUKE, a

citizen of the United States;i residing atA Pinetop, .in the lcountyofTaney and State of Missouri, have invented certain new and usefulImprovements in Bolt-Extractors, of which the following is aspecification.

This invention relates to bolt or nail eX- tractors, and primarily tothat class in which a claw bar is used, which has its fulcrum capable ofmovement.

In constructing a device of the above charl' acter, the clamping claw ormember is afforded a. greater clamping `power .when the device isoperated, thereby assuring a' secure gripping vof the nail or spike.

For a full understanding of the present invention, reference is to behad to the ifollowing description and to the accompanying drawings, inwhich- Figure 1 is a side elevation of the present invention, having oneof the vlink connections broken away to more clearly disclose theconstruction of the claw members.' Fig. 2 is a similar view disclosingthe claw members gripping a bolt or spike. Fig. 3 isa. rear elevation'of the device, as shown 1n n Fig. 1. Fig. 4 is a top plan view thereof.

'employing a modified form ofA Fig. 5 is a sectional viewof a nailextractor clamping member. Fig. 6 is a. detail -view of the modied formof clamping member.

Throughout the following detail description and on the several iguresofthe drawings, similar parts are referred to by like referencecharacters.

In constructing the present invention, the claw bar 1 is employed havingthe claw 2 provided on one terminal thereof, and adjacent to saidterminal, the bar or lever '1 is apertured to receive the pin 3 on whichis pivotally mounted the link members 4 and 5. A second claw or clampingmember 6 is adjustably connected to the link member 4 through theopenings and has a claw terminal 8 overlapping the claw 2, as is clearlyillustrated in Fig. l. By so constructing and positioningv the clampingmember 6, i't will be impossible for said member to become displaced.The linkmembers 5 have interposed therebetween at their free ter- Vmmalsan anti-friction roller bearing -9,

which forms the fulcrum for the lever 1. The bearing member 9 isadjustably connected by the link members 10 to the clamptwo links ingmember 6, which latter is provided with a ylurality of perforations 11.

n operating the device, the spike is placed in the claw 2, after whichthe clamping member 6 is closed thereagainst, as disclosed in Fig. 2,thus causing-the bearing or fulcrum member 9 to be spaced from the leverl. The lever 1 is then depressed, which will tend to draw the clampingmember 6 toward the spike, thereby causing said clamping member to moresecurely grip the spike, which prevents the latter from slipping whenbeing extracted. After the lever l has been depressed to a certainpoint; the fulcrum member` 9 will have .atendency to move fromunder saidlever, .which movement will force the clamping member from engagementwith the spike. Furthermore, the spike is extracted in a verticalposition, thereby eliminating the the extractors now on the market,namely, bending of the spike when extracted, owin to the movement of theclaw member, an enlargement of the hole caused by the latter movement.In the present invention, eX- tracting the spike in a vertical path ispermitted through the roller bearing 9, which advances toward the spikeon movement'otl the lever 1, as disclosed in the dotted lines of Fig.`2.

In the modified construction shown in Fig. 5, the clamping member 6 isprovided on its clamping terminal with a plurality of engaging teeth orserratipns 8, any one of which may be engaged by the claw 2 of the lever1, which will enlarge the opening in the claw 2 or decrease the same,depending upon the tooth engaged for extracting different sized spikes.Furthermore, the serrations 8 which are above the tooth engaged by theclaw 2', are adapted to engage or bite l` into the spike, which doublysecures the spike from slipping.

Hawing thus described the whatrsclaimed as new is:

1. A device of the class described, consisting of aclaw bar providedwith a claw at its operative end, a claw member adapted to engage saidclaw for retaining a spike in the latter when forced thereagainst,almember connecting said claw bar and claw member, a' link pivotallyconnected to said claw bar, a link pivotally connected to said clawmember, and a pivotal connection .for said` arranged below the claw barar invention,

-H- said claw bar.

adapted to serve as a fulcrum bearing -for engage said claw latter whenforced thereagainst, a member connecting said claw bar and clawmember,..

a pair of links pivotally connected to said claw bar, one link beingarranged on each side of the claw bar, a pair of links pivotallconnected with said claw member, one lin being arranged on each side ofthe claw member, said `pairs of Vlinks being pivotally connectedtogetli'er below the claw bar and their pivotal connection serving. as alfulcrum bearing for said claw bar.

3. A device of the class described consisting of aclaw bar provided witha claw at its operative end, a claw member adapted to engage said clawfor retaining a spike in the latter when forced thereagainst, Aa linkpivotally connected to said claw member and also.V 'pivotally connectedto said claw bar,

a bearing member for said claw bar ar-A ranged beneath the same andmovable relatively thereto, a .linkV connecting said bearing member withsaid claw-bar,.and a link pivotally connecting said bearing .'memberwith said claw member. 4. A device of' the class' described consist- Ying of a clawibar provided /witli a claw at 1ts loperative-end, a clawmemberadapted to engage said claw for retaining a spike in the latterwhen forced thereagainst, a link connecting said vclaw bar and clawmember, a bearing member consisting of a roller connected with saidclawbar and movable relay 1 tively thereto,'and almember ivotally conbearingmem er and havan adjustable pivotal Vconnection with nected with saidsaid/claw member', said claw member having @plurality o f teeth-orengaging saidcla'w.

claw member adapted to' for retaining a spike in 'the ber Awith sai 5. Adevice of the class described consist.-

ing of a claw bar provided with a clawat its operativeend, a claw memberadapted to engage said claw lfor retaining a spike' in the latterwhenforced thereaga1nst, a link pivotally connected to said claw member andalso pivotally connected to said clarvvcbar, av bearing memberconsisting of a rollery for said claw'bar arranged 'beneath the same andmovablerelatively thereto, a pair of links pivotall connecting saidbearing memclaw bar, one link being arranged on each side of the clawbar, and a pair of links pivotally connect-ing said bearing member withsaid claw member, one link being arranged on each side ofthe clawmember.

6. A device of the class described consisting of a claw bar providedWith a claw at its operative end, a claw member adapted to engage I'saidclaw for retaining a spike in ,the latter vwhen forced thereagainst, alink pivotally connected to said claw member and alsopivotallyzconnected to said claw bar ata point above -`the claw thereon,a beari'ng member for said claw bar having its axis of movement movabletoward and away from said claw'bar, apair of links pivotally' lconnectings'a'id bearing member with said claw bar at a point above theclaw thereon,

one link bein -arranged on eachside of said claw bar, an a, pair oflinks pivotaily connected to said bearingmember and 'having anadjustable and pivotal' connection with said claw member, the latterbeing provided.

'slgnature Witnesses;

' J. ,A. BURNETT,

J. W. Hnnrro'lin.

vLUKE. C

